The JMC Code L Baseline code and data can be dowloaded from the download link under http://mitgcm.org/projects/ESMF/JMClbaseline. This link will fetch a compressed tar archive called JMClbaseline.tar.gz. After downloading, this file needs to uncompressed using the command gzip -d JMClbaseline.tar.gz and its contents extracted using the command tar -xvf JMClbaseline.tar into an appropriate workspace directory ( for example a directory under /work on the halem.gsfc.nasa.gov system ).